Viessmann Boiler Error Codes

Vitodens 200 Boiler Error Codes

Fault Code

System Behaviour

Cause of Problem

Burner control switches to lockout

Safety chain was activated

04, 05, 06, 08

Burner control switches to lockout

Fan speed too high/low at start

07, 09

Burner control switches to lockout

Basic level of air pressure threshold in standby mode not correct

Burner control switches to lockout

Fault, fan speed

Burner control switches to lockout

Reset button pressed repeatedly or while burner is running

1A, 1B

Burner blocked

Flow sensor 1, 2 faulty

Burner blocked

Differential flow rate too large

Boiler operates with high boiler water temperature

Emissions test switch turned to “hand symbol” for 30 minutes already

Boiler operates with continuous relay test

Setting mode for maximum or minimum rated input active for 30 minutes already

Boiler does not activate

Reset button (pressed while burner is OFF) with emissions test switch turned to “hand symbol”

N/A

KM-BUS fault to Vitocom

N/A

Short circuit / open circuit

Fault Code 0B

Fault Code

System Behaviour

Cause of Problem

Vitodens 200

Burner control switches to lockout. Fan does not idle after auto reset (incorrect fan rpm).

Severe wind conditions in vent system

Vitodens 100-W

Burner blocked

Insufficient water flow, incorrect flow direction, defective flow switch.

Fault Code 0C

Fault Code

System Behaviour

Cause of Problem

Vitodens 100-W

Burner blocked

Vitodens 200

Burner control switches to lockout

Flame signal still present after switching off

Fault Code 0F

Fault Code

System Behaviour

Cause of Problem

Vitodens 222-F

Control mode

Code “0F” is only displayed in the fault history

Vitotronic 300 / Vitotronic 300-K, with Vitotronic 300 / Vitodens 200-W / Vitocontrol-S, with Vitotronic 100

Control mode / Controlled operation

Boiler service required

Vitotronic 200 / 300

Normal operation

Boiler service required

Vitocontrol-S, MW1 with Vitotronic 100 / Vitotronic 300-K, MW1S with Vitotronic 100

Control mode

Maintenance – “0F” is only displayed in the fault history

Fault Code 10

Fault Code

System Behaviour

Cause of Problem

Vitodens 200-W / 222-F / Vitotronic 300 / 200/ 200-H / 050/200-H / 300-K / vitocontrol-S

Boiler operates based on outdoor temperature of 32°F / 0°C

Short circuit – outdoor temperature sensor

Vitotronic 300-K, MW2S with Vitotronic 100 / Vitodens 100-W (combiPLUS) / 200-w / Vitocontrol-S, WB2B with Vitotronic 100

Controls as if the outdoor temperature / Constant Mode

Outdoor temperature sensor shorted out

Error Code 10, 14, F3, and F4

Fault Code

System Behaviour

Cause of Problem

Vitodens 200-W / 222-F / Vitotronic 300 / 200/ 200-H / 050/200-H / 300-K / vitocontrol-S

Boiler operates based on outdoor temperature of 32°F

Short circuit – outdoor temperature sensor

Vitotronic 300-K, MW2S with Vitotronic 100 / Vitodens 100-W (combiPLUS) / 200-w / Vitocontrol-S, WB2B with Vitotronic 100

Control as if the outdoor temperature is in constant mode

Outdoor temperature sensor shorted out

Fault Code 18 and D1

Fault Code

System Behaviour

Cause of Problem

Vitodens 100 / 200-W / 222-F / Vitotronic 300-K With 100 / Vitocontrol-S

Boiler operates based on outdoor temperature of 32°F / 0°C / Constant Mode

Outdoor temperature sensor cable broken

Vitotronic / 100 / 200 / 300 / 050/200-H /300-K / Vitocontrol-S, MW1 with Vitotronic 100

Operates on basis of 32°F / 0°C outdoor temperature

Open circuit – Outdoor temperature sensor

Vitotronic 200-H / Vitotronic 300-K, MW1B with Vitotronic 300 / Vitotronic 300-K, MW2B with Vitotronic 200

Controls as if the outdoor temperature

Lead break – Outdoor temperature sensor

Vitotronic 050/200-H

Activates after 0°C / 32°F outdoor temperature

Cable break – Outdoor temperature sensor

Vitodens 100-W

Burner in fault mode

DIP switch S2 is set to “ON”

Fault Code 19

Fault Code

System Behaviour

Cause of Problem

Vitotronic 300

Activates after 0°C / 32°F outdoor temperature

Communication fault, wireless outdoor temperature senso

Fault Code 20

Fault Code

System Behaviour

Cause of Problem

Vitocontrol-S with Vitotronic 100 / Vitotronic 300 / 300-K / 200 / 100

Stand-alone control unit without supply temperature sensor (possibly supply temperature not high enough)

Short circuit – Common supply temperature sensor

Vitocontrol-S with Vitotronic 100 / Vitotronic 300-K, with Vitotronic 200

Vitocontrol-S, controls in a stand-alone manner w/o supply temperature sensor (supply temperature may not be high enough)

Common supply temperature sensor shorted out

Vitocrossal 300

Regulates without supply temperature sensor (low-loss header)

Short circuit – System Flow temperature sensor

Vitodens 200-W / 222-F

Regulates without supply temperature sensor (low-loss header)

Short circuit – System supply temperature sensor

Vitotronic 050/200-H< / 200 / 200-H / 300

Mixing valve closed

Short circuit – Supply temperature sensor / mixing valve circuit M1

Vitotronic 300-K, with Vitotronic 100

Vitotronic 300-K, MW1S controls in a stand-alone manner w/o strap-on sensor (supply temperature may not be high enough)

Short circuit – Strap-on temperature sensor

Vitodens 200-W

Regulates without supply temperature sensor (low-loss header)

System supply temperature sensor shorted out

Fault Code 21

Fault Code

System Behaviour

Cause of Problem

Vitotronic 200 / 300

Operation without influence of return water temperature

Short circuit – Return water temperature sensor

Error Code 28

Fault Code

System Behaviour

Cause of Problem

Vitocontrol-S with Vitotronic 100

Vitocontrol-S, VD2/CT3/CM2 controls in a stand-alone manner w/o supply temperature sensor (supply temperature may not be high enough)

Open circuit – common supply temperature sensor

Vitocontrol-S with Vitotronic 100 / Vitotronic 300-K,with Vitotronic 100

Vitocontrol-S, WB2B controls in a stand-alone manner w/o supply temperature sensor (supply temperature might not be high enough)

Common supply temperature sensor cable broken

Vitocrossal 300 / Vitodens 200-W / 22-F

Regulates without supply temperature sensor (low-loss header)

System supply temperature sensor cable broken

Vitotronic 050/200-H

Mixing valve closes

Cable break – Supply temperature sensor

Vitotronic 050/200-H

Mixing valve is closed

Open circuit – Supply temperature sensor of mixing valve circuit M1

Vitotronic 200-H / Vitotronic 200 / 300

Mixing valve is being closed

Lead break – Supply temperature sensor in heating circuit with mixing valve M1 (heating circuit 1)

Vitotronic 300 Vitotronic / 300-K with Vitotronic 300 / 200

Stand-alone control unit without supply temperature sensor (possibly supply temperature not high enough)

Lead break, common supply temperature sensor

Vitotronic 300-K with Vitotronic 100

Vitotronic 300-K, MW1S controls in a stand-alone manner w/o strap-on sensor (supply temperature may not be high enough)

Open circuit – Strap-on temperature sensor

Fault Code 29, 41, 49, F80, F81, F83, F88 and F89

Fault Code

System Behaviour

Cause of Problem

Vitotronic 200 / 300

Normal operation without influence of return water temperature

Open circuit 1 or 2 – Return water temperature sensor (of mixing valve circuit 1)

Fault Code 30

Fault Code

System Behaviour

Cause of Problem

Vitocontrol-S, with Vitotronic 100 / Vitocrossal 300 / Vitodens 200-W / 222-F / Vitotronic 100 / 200 / 300

Adjustable high limit burner is started and stopped

Short circuit – Boiler water temperature sensor

Vitocontrol-S with Vitotronic 100 / Vitodens 100-W (CombiPLUS)/ 200-1

Burner blocked

Boiler water temperature sensor shorted out

Fault Code 38

Fault Code

System Behaviour

Cause of Problem

Vitodens – 200-W / 222-F / COMBIPLUS

Burner blocked

Boiler water temperature sensor cable broken

Vitotronic 100 / 200 / 300 / Vitocontrol-S with Vitotronic 100

Burner is switched on and off by the adjustable high limit

Open circuit – Boiler temperature sensor

Vitotronic 300-K with Vitotronic 300 / Vitotronic 300-K with Vitotronic 300

The burner is started and stopped via a temperature controller

Lead break, boiler water temperature sensor

Vitodens 100-W

Burner blocked

Boiler water temperature sensor lead broken

Error Code 40 and 44

Fault Code

System Behaviour

Cause of Problem

All Viessmann boilers

Burner blocked

Heating circuit 2 with mixing valve supply short circuit on temperature sensor

Fault Code 41

Fault Code

System Behaviour

Cause of Problem

Vitotronic 300

Operation without accounting for return water temperature

Short circuit – Return water temperature sensor of mixing valve circuit 2

Fault Code 48 and 4C

Fault Code

System Behaviour

Cause of Problem

All Viessmann boilers

Mixing valve closes / closed

Heating circuit 2 with mixing valve supply temperature sensor cable broken / open circuit

Fault Code 50, 51, 58 and 59

Fault Code

System Behaviour

Cause of Problem

Vitodens 200-W / 222-F

No DHW heating / Fault with DHW

Short circuit/open circuit – DHW tank temperature sensor or lead break

Error Code 52

Fault Code

System Behaviour

Cause of Problem

Vitotronic 300

Control mode

Short circuit – Supply temperature sensor low-loss header

Vitodens 100-W CombiPLUS

Burner blocked (with CombiPLUS only)

Flow sensor shorted out (in CombiPLUS)

Fault Code 55, 56 and 57

Fault Code

System Behaviour

Cause of Problem

Vitotronic 300Vitotronic 300-K, with Vitotronic 200

Control mode

Maintenance or error on Vitotronic 100 of boiler 5-8

Fault Code 5A, B7, and B8

Fault Code

System Behaviour

Cause of Problem

All Viessmann boilers

Control mode

Lead break, low-loss header – Supply temperature sensor

All Viessmann boilers

Burner blocked / control mode

Sensor cable broken

Error Code 5C, 5D, 5E and 5F

Fault Code

System Behaviour

Cause of Problem

Vitotronic 300-K with Vitotronic 200

Control mode

Communication fault, Vitotronic 100 of boiler 5-8

Fault Code 60, 68, 70, 78, BD, BE and BF

Fault Code

System Behaviour

Cause of Problem

All Viessmann boilers

– No output reduction

– Return control open

Fault Code 80, 81, 82, 83 and FD

Fault Code

System Behaviour

Cause of Problem

All Viessmann boilers

Burner control unit in a fault state; system cools down; burner control unit locked out

Short circuit – Boiler water temperature sensor, burner control unit

Error Code 88, 89, and E6

Fault Code

System Behaviour

Cause of Problem

Vitocontrol-S with Vitotronic 100 / Vitotronic 300-K with Vitotronic 100 / 200

Control mode

Communication error

Fault Code 8C, 8D, 8E and 8F

Fault Code

System Behaviour

Cause of Problem

Vitotronic 300

Burner control unit in an error mode

Lead break, boiler water temperature sensor, burner control unit

Error code 90, 91, 92, 93, 94, 98, 99, 9A, 9B , 9C, 9E, 9F and AB

Fault Code

System Behaviour

Cause of Problem

Viessmann boilers

Control mode

Short circuit – Temperature sensor [5] / [6] / [7] / [10]

Error Code A0, A1, A2, AA, and AC

Fault Code

System Behaviour

Cause of Problem

Vitodens 200

Pump running at maximum speed

Open circuit – Internal BUS connection issue

Fault Code A3, B0, F1, FE1 and FE2

Fault Code

System Behaviour

Cause of Problem

Vitocrossal 300 / Vitodens 200-W / 222-F / 300

Control mode is in factory default setting

Programming unit is faulty

Fault Code A4

Fault Code

System Behaviour

Cause of Problem

222-F

Burner blocked. The venting program automatically starting

Air lock in the internal circulation pump or minimum flow rate not achieved

Fault Code A7

Fault Code

System Behaviour

Cause of Problem

Vitocontrol-S with Vitotronic 100 / Vitotronic 100 / Vitotronic 300-K with Vitotronic 300

Control mode (stays in factory default setting)

Isolation valve error coding OC:2, OC:3 or OC:4 set, and coding 4E:1 not set

Error Code A8

Fault Code

System Behaviour

Cause of Problem

All Boilers

Control mode issue

Programming unit communication fault

Fault Code A9, BA, BB, BC and FE0

Fault Code

System Behaviour

Cause of Problem

Vitodens 200

Boiler cools down

Sensor inputs are not read correctly

Fault Code AD

Fault Code

System Behaviour

Cause of Problem

Vitodens 200

Setting via service level not possible

Data points are not stored internal error VR20

Fault Code B1

Fault Code

System Behaviour

Cause of Problem

Vitocontrol-S with Vitotronic 100 / Vitotronic 100 / 200 / 300 / Vitotronic 300-K with Vitotronic 100

Test mode on emissions

Internal electronics error

Vitocontrol-S with Vitotronic 100 / Vitodens 200-W

Regulates as if the outside temperature was 32°F

Internal error

Vitotronic 050/200-H

Control characteristics undefined

Electronics internal error

Error Code B2

Fault Code

System Behaviour

Cause of Problem

All viessmann boilers

Control mode

Internal electronics error

Fault Code B3 and E5

Fault Code

System Behaviour

Cause of Problem

All boilers

Constant Mode

Invalid hardware recognised

Fault Code B4

Fault Code

System Behaviour

Cause of Problem

Vitocontrol-S with Vitotronic 100 / Vitotronic 100 / 200 / 300 / Vitotronic 300-K with Vitotronic 100

Emissions test mode

Internal electronics fault

Vitocontrol-S with Vitotronic 100 / Vitodens 200-

Regulates as if the outside temperature was 32°F (0°C)

Internal fault

Vitotronic 050/200-H

Undefined control characteristics

Internal electronics fault

Fault Code B5

Fault Code

System Behaviour

Cause of Problem

All Viessmann boilers

Control mode

External safety equipment

Error Code B6

Fault Code

System Behaviour

Cause of Problem

All Viessmann boilers

Control mode

Open circuit – KM bus to solar control unit communication error

Fault Code B9, ED, F0, FE5, FEC, FED, FEE, FEF, FFD and FFF

Fault Code

System Behaviour

Cause of Problem

Vitocontrol-S with Vitotronic 100 / Vitotronic 100 / 300 / Vitotronic 300-K with Vitotronic 300

Boiler cools down

Error maximum pressure limiter 1 2

Fault Code C1

Fault Code

System Behaviour

Cause of Problem

All Viessmann boilers

Burner control unit switches to lockout, this could be due to large line voltage fluctuations

Differential air pressure sensor open circuit

Fault Code C2-C8, CD-CF, D2-D8, DA-DF, and E0

Fault Code

System Behaviour

Cause of Problem

All Viessmann boilers

Boiler cools down

Fixed high limit has responded or fuse F2 has blown.

Error code C9, CA and CB

Fault Code

System Behaviour

Cause of Problem

All viessmann boilers

Boiler drives up to electronic maximum limit

Boiler does not log in at the cascade control unit

Error code CC and F0

Fault Code

System Behaviour

Cause of Problem

All viessmann boilers

Burner control unit is in fault mode

Ionisation current too high during calibration – Boiler temperature limiter responded air or blockage in system/pump error

Fault Code D4

Boiler cools down Error with safety equipment at ‘X2/X3/X7’ of plug-in adaptor 2 for external safety equipment

Fault Code

System Behaviour

Cause of Problem

Vitotronic 300 / Vitotronic 300-K with Vitotronic 300

Vitodens 200

Boiler is operating in emergency mode (after 30 mins BUS error) or boiler cools down

Internal bus error or open circuit internal bus connection

Fault Code D5

Fault Code

System Behaviour

Cause of Problem

All Viessmann boilers

Burner blocked

Flue gas temperature sensor not properly positioned – Check Sensor External pump fitted on system

Fault Code E1, E7, E8, E9, EA, EB, EC and FF2

Fault Code

System Behaviour

Cause of Problem

Vitodens 200-W / 222-F / Vitotronic 300

Burner in fault mode

Flow rate for heating hot water is too low during calibration / flow switch caused shutdown

Error Code E2 and E3

Fault Code

System Behaviour

Cause of Problem

All boilers

Burner in fault mode

Heating water flow rate too low during calibration; flow switch caused shutdown

Fault Code E4

Fault Code

System Behaviour

Cause of Problem

Vitotronic 300, Vitodens 200-W, 222-F, Vitocrossal 300, Vitocontrol-S with Vitotronic 100

Burner error

Burner start flame signal is too weak or missing

Fault Code EE and EF

Fault Code

System Behaviour

Cause of Problem

Vitotronic 300, Vitodens 200-W, 222-F, Vitocrossal 300, Vitocontrol-S with Vitotronic 100

Burner blocked

Broken gas valve or faulty air pressure – switch air damper flap is stuck

Fault Code F5

Fault Code

System Behaviour

Cause of Problem

All viessmann boilers

Gas pressure switch shows no gas pressure / electrical connection error

Gas shut-off valve closed / gas pressure switch faulty / multiple problems with gas supply

Fault Code F6, 58, F9, FE1, FE2 and FF6

Fault Code

System Behaviour

Cause of Problem

All Viessmann boilers

Burner in error mode emergency operation

Gas shut-off valve closed / gas pressure switch faulty / multiple problems with gasFan not at standstill / plug-in connection error supply

Fault Code FA and FB

Fault Code

System Behaviour

Cause of Problem

All Viessmann boilers

Control mode

Communication fault with boiler

Error Code FB7, FF4, FF2, FF7, FF8 and FF9

Fault Code

System Behaviour

Cause of Problem

Vitocrossal 200

Case A: Burner control unit in a fault state; system cools down; burner control unit locked out. Case B: Type of coding card

Case A: Coding card not inserted in the burner control unit; incorrect or faulty coding card. Case B: Coding card does not match burner control unit.

Fault Code FC

Fault Code

System Behaviour

Cause of Problem

All Viessmann boilers

Burner in fault mode

Gas valve faulty or faulty modulation valve control; or vent system blocked

Error Code FE

Fault Code

System Behaviour

Cause of Problem

All Viessmann boilers

Burner blocked or in error mode

Strong interference (EMC) field nearby, or faulty main PCB

Error Code FE4

Fault Code

System Behaviour

Cause of Problem

Vitocrossal 200

Burner shuts down

Multiple detection of undervoltage

Fault Code FFA, FFB and FR

Fault Code

System Behaviour

Cause of Problem

Vitocrossal 200 / 400-620 / 186-311

Fan runs without demand; burner control unit in a fault state

Fan has not stopped; cable [100A] faulty; fan faulty; burner control unit faulty

Viessmann Boiler Error Codes

Vitodens 200 Boiler Error Codes

Fault Code 0B

Fault Code 0C

Fault Code 0F

Fault Code 10

Error Code 10, 14, F3, and F4

Fault Code 18 and D1

Fault Code 19

Fault Code 20

Fault Code 21

Error Code 28

Fault Code 29, 41, 49, F80, F81, F83, F88 and F89

Fault Code 30

Fault Code 38

Error Code 40 and 44

Fault Code 41

Fault Code 48 and 4C

Fault Code 50, 51, 58 and 59

Error Code 52

Fault Code 55, 56 and 57

Fault Code 5A, B7, and B8

Error Code 5C, 5D, 5E and 5F

Fault Code 60, 68, 70, 78, BD, BE and BF

Fault Code 80, 81, 82, 83 and FD

Error Code 88, 89, and E6

Fault Code 8C, 8D, 8E and 8F

Error code 90, 91, 92, 93, 94, 98, 99, 9A, 9B , 9C, 9E, 9F and AB

Error Code A0, A1, A2, AA, and AC

Fault Code A3, B0, F1, FE1 and FE2

Fault Code A4

Fault Code A7

Error Code A8

Fault Code A9, BA, BB, BC and FE0

Fault Code AD

Fault Code B1

Error Code B2

Fault Code B3 and E5

Fault Code B4

Fault Code B5

Error Code B6

Fault Code B9, ED, F0, FE5, FEC, FED, FEE, FEF, FFD and FFF

Fault Code C1

Fault Code C2-C8, CD-CF, D2-D8, DA-DF, and E0

Error code C9, CA and CB

Error code CC and F0

Fault Code D4

Fault Code D5

Fault Code E1, E7, E8, E9, EA, EB, EC and FF2

Error Code E2 and E3

Fault Code E4

Fault Code EE and EF

Fault Code F5

Fault Code F6, 58, F9, FE1, FE2 and FF6

Fault Code FA and FB

Error Code FB7, FF4, FF2, FF7, FF8 and FF9

Fault Code FC

Error Code FE

Error Code FE4

Fault Code FFA, FFB and FR

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